Tow device for automated guided vehicle

ABSTRACT

This disclosure relates to systems and methods of towing, hitching, and connecting devices. In particular, this disclosure relates to tow devices, hitches, and connections for towing item containers behind vehicles, both autonomous and manually guided.

INCORPORATION BY REFERENCE TO ANY PRIORITY APPLICATIONS

Any and all applications for which a foreign or domestic priority claimis identified in the Application Data Sheet as filed with the presentapplication are hereby incorporated by reference under 37 C.F.R. § 1.57.This application is a continuation of U.S. application Ser. No.16/883,132, filed May 26, 2020, which claims the benefit of priority toU.S. provisional application 62/853,366, filed May 28, 2019, the entirecontents of which are hereby incorporated by reference.

BACKGROUND Field

This disclosure relates to systems and methods of towing, hitching, andconnecting devices. In particular, this disclosure relates to towdevices, hitches, and connections for towing item containers behindvehicles, both autonomous and manually guided.

Description of the Related Art

Item delivery is increasing as more consumers purchase items online andhave them delivered to their homes or business. Increased item deliveryrequires the increased movement of large quantities of items. This meansthat problems facing moving large quantities of items, includinghitching item containers to vehicles, towing item containers, andhitching/towing multiple item containers in sequence, are also rising.It is desirable to have towing, hitching, and connection solutions whichaddresses these problems.

SUMMARY

Methods and apparatuses or devices disclosed herein each have severalaspects, no single one of which is solely responsible for its desirableattributes. Without limiting the scope of this disclosure, for example,as expressed by the claims which follow, its more prominent featureswill now be discussed briefly. After considering this discussion, andparticularly after reading the section entitled “Detailed Description”one will understand how the described features provide advantages thatinclude towing and connections.

In one aspect, a tow device is disclosed herein. The tow device caninclude a main body. The main body can have a top portion and a bottomportion. The tow device can include a plurality of legs that can includea fixed leg, a first pivot leg, and a second pivot leg. A first end ofthe fixed leg can be coupled to the main body such that the fixed leg isimmobile in relation to the main body. A first end of each of the firstand second pivot legs can be rotatably coupled to the main body. Each ofthe plurality of legs can include a longitudinal portion extending fromthe first end of each of the plurality of legs to a second end of eachof the plurality of legs. The second end of each of the plurality oflegs can have a mating portion extending transversely from thelongitudinal portion of each of the plurality of legs.

In some embodiments, the top portion can include at least two aperturesformed therein. The bottom portion can include at least two aperturesformed therein. Each of the at least two apertures of the top portioncan be positioned coaxially with one of the at least two apertures ofthe bottom portion to define at least two pivot axes.

In some embodiments, the first end of each of the first and second pivotlegs can include a joint having an aperture. Each aperture of each jointcan be positioned coaxially with one of the at least two pivot axes andbetween the top portion and the bottom portion. Each joint can berotatably coupled to the main body by a clevis pin and a cotter pin.

In some embodiments, the top portion can include a handle whichcomprises a vertical portion and a grasping portion. The verticalportion can extends perpendicularly from a longitudinal plane of the topportion. A grasping portion can extend transversely from thelongitudinal axis of the vertical portion.

In some embodiments, the first and second pivot legs can rotate to aposition adjacent the fixed leg for compact storage with the tow device.

In some embodiments, the first and second pivot legs can each be removedby removing the clevis and cotter pins.

In another aspect, a tow device described herein can include a mainbody. The main body can have a top portion, a bottom portion, and aplurality of positioning apertures. The main body can have a pluralityof legs that can include a fixed leg, a first pivot leg, and a secondpivot leg. A first end of the fixed leg can be coupled to the main bodysuch that the fixed leg is immobile in relation to the main body. Afirst end of each of the first and second pivot legs can be rotatablycoupled to the main body. A locking member can be positioned between thefirst end and a second end of each of the first and second pivot legs.Each locking member can interface with the plurality of positioningapertures of the main body such that the first and second pivot legs canbe disposed in at least a first position and a second position. Each ofthe plurality of legs can include a longitudinal portion extending fromthe first end of each of the plurality of legs to the second end of eachof the plurality of legs. The second end of each of the plurality oflegs can include a mating portion that extends transversely from thelongitudinal portion of each of the plurality of legs.

In some embodiments, the top portion can include at least two aperturesformed therein. The bottom portion can include at least two aperturesformed therein. Each of the at least two apertures of the top portioncan be positioned coaxially with one of the at least two apertures ofthe bottom portion to define at least two pivot axes. The first end ofeach of the first and second pivot legs can include a joint having anaperture. Each joint can be positioned coaxially with one of the atleast two pivot axes and between the top portion and the bottom portion.

In some embodiments, the plurality of positioning apertures can bedisposed on the top portion.

In some embodiments, the plurality of positioning apertures can includea pair of outer positioning apertures and a pair of inner positioningapertures. The outer positioning apertures can position the first andsecond pivot legs in an outer position, defining an outer angle, wheneach locking member is interfacing with the outer positioning apertures.The inner positioning apertures can position the first and second pivotlegs in an inner position, defining an inner angle that is smaller thanthe outer angle, when each locking member is interfacing with the innerpositioning apertures.

In some embodiments, each of the locking members can extend transverselyfrom the longitudinal portion of each of the first and second pivotlegs.

In some embodiments, the first and second pivot legs can rotate to aposition adjacent the fixed leg with the locking members disengaged fromthe plurality of positioning apertures.

In some embodiments, the first and second pivot leg are each configuredto be removed by removing the clevis and cotter pins.

In some embodiments, a tow device is disclosed herein. The tow devicecan include a fixed leg that can have a first end and a second end. Thefirst end can include a first mating portion and the second end can havea second mating portion. The first and second mating portions can extendtransversely from a longitudinal direction of the fixed leg. The towdevice can include a pivot leg that can have a first end and second end.The first end of the pivot leg can be rotatably coupled proximate to thefirst end of the fixed leg. The second end of the pivot leg can have asecond mating portion. The second mating portion of the second end ofthe pivot leg can extend transversely from a longitudinal portionextending between the first and second ends of the pivot leg.

In some embodiments, the tow device can include a top portion and abottom portion. The top portion and bottom portion can be coupled to thefixed leg such that the top portion and bottom portion are offset fromeach other. The first end of the pivot leg can be positioned between thetop portion and bottom portion. The first end of the pivot leg can berotatably coupled to the fixed leg by a pin extending through the firstend of the pivot leg, top portion, and bottom portion.

In some embodiments, the pivot leg can include an aperture on the firstend through which the pin can be inserted. The pin can be coupled to thetop portion and bottom portion.

In some embodiments, an offset distance between the top and bottomportions can be greatest where the pivot leg is disposed between the topand bottom portions.

In some embodiments, the fixed leg and/or the pivot leg can include anextrusion that extends transversely from a longitudinal direction of therespective leg from which the extrusion extends. The extrusion canprevent the second ends of the fixed leg and pivot leg from touching.

In some embodiments, the pivot leg can rotate to a position proximatethe fixed leg for compact storage.

In some embodiments, a handle can be positioned on the first end of thefixed leg. The handle can include a vertical portion that can extend ina direction opposite the mating portion of the first end of the fixedleg.

BRIEF DESCRIPTION OF THE DRAWINGS

The foregoing and other features of the present disclosure will becomemore fully apparent from the following description and appended claims,taken in conjunction with the accompanying drawings. Understanding thatthese drawings depict only several embodiments in accordance with thedisclosure and are not to be considered limiting of its scope, thedisclosure will be described with additional specificity and detailthrough use of the accompanying drawings.

FIG. 1A illustrates a top perspective view of an example tow device.

FIG. 1B illustrates a bottom perspective view of the example tow deviceof FIG. 1A.

FIG. 1C illustrates a side view of the example tow device of FIG. 1A.

FIG. 1D illustrates a front view of the example tow device of FIG. 1A ina storage position.

FIG. 1E illustrates a vehicle towing multiple containers using towdevices.

FIG. 2A illustrates a top perspective view of an example tow device.

FIG. 2B illustrates a top perspective view of a portion of the exampletow device of FIG. 2A.

FIG. 2C illustrates a side perspective view of a portion of the exampletow device of FIG. 2A.

FIG. 2D illustrates a portion of the example tow device of FIG. 2A.

FIG. 2E illustrates a portion of the example tow device of FIG. 2A.

FIG. 2F illustrates a portion of the example tow device of FIG. 2A.

FIG. 2G illustrates the example tow device of FIG. 2A in a storageposition.

FIG. 3A illustrates an example tow device.

FIG. 3B illustrates another view of the example tow device of FIG. 3A.

FIG. 3C illustrates another view of the example tow device of FIG. 3A.

DETAILED DESCRIPTION

In the following detailed description, reference is made to theaccompanying drawings, which form a part thereof. In the drawings,similar symbols typically identify similar components, unless contextdictates otherwise. Thus, in some embodiments, part numbers may be usedfor similar components in multiple figures, or part numbers may varydepending from figure to figure. The illustrative embodiments describedin the detailed description, drawings, and claims are not meant to belimiting. Other embodiments may be utilized, and other changes may bemade, without departing from the spirit or scope of the subject matterpresented here. It will be readily understood that the aspects of thepresent disclosure, as generally described herein, and illustrated inthe Figures, can be arranged, substituted, combined, and designed in awide variety of different configurations, all of which are explicitlycontemplated and made part of this disclosure.

The quantity of items, such as packages and parcels, being delivered tohomes and businesses is rising. Often large quantities of items need tobe moved quickly and efficiently. Consequently, distribution networks,such as the United States Postal Service (USPS), sometimes use vehiclesto tow one or more item containers, such as rigid and collapsible wirecontainers, pallets, wheeled shelves, bins, pouches, bags, containers,and rolling stock to move large quantities of items in an efficientmanner. Item containers can have hitch connections at varying positions,and if an inappropriate tow device is used, item containers can bedamaged, vehicle and operator efficiency can be reduced, and/or itemscan be damaged. Accordingly, distribution networks can use adjustabletow devices to quickly and efficiently hitch item containers to eachother and/or towing vehicles.

Example Tow Device

FIG. 1A-1D are illustrations of an embodiment of a tow device. FIG. 1Aillustrates a tow device 100 with a main body 102. The main body 102 hasa top portion 104, a back portion 114, a bottom portion 120, and, asshown in FIG. 1B, a front portion 136. In some embodiments, the topportion 104, back portion 114, bottom portion 120, and/or front portion136 are different portions of a monolithic main body 102. In someembodiments, top portion 104, back portion 114, bottom portion 120,and/or front portion 136 are coupled together. In some embodiments, topportion 104, back portion 114, bottom portion 120, and/or front portion136 are welded together. In some embodiments, each of the top portion104, back portion 114, bottom portion 120, and/or front portion 136 areformed from plates and/or sheets of material having thicknesses of 1/16inch to ¾ inch. In some embodiments, bottom portion 120 has a centerbottom aperture 148.

As shown in FIG. 1A, the top portion 104 has a handle 122 that isconfigured to be grasped by a user. The handle 122 has a verticalportion 154 and a grasping portion 156. The vertical portion 154 extendsperpendicularly from a top surface of the top portion 104. The graspingportion 156 extends transversely from the longitudinal axis of thevertical portion 154. The grasping portion 156 extends perpendicularlyfrom the longitudinal axis from the vertical portion 154. The graspingportion 156 is parallel with the fixed leg 132. The grasping portion 156is offset above the fixed leg 132. The handle 122 has a curve betweenthe vertical portion 154 and grasping portion 156. The handle 122 has anangle between the vertical portion 154 and the grasping portion 156. Thehandle 122 has a ninety-degree angle between the vertical portion 154and grasping portion 156. The handle 122 has a cross-section that iscircular. In some embodiments, the handle 122 has a cross-section thatis any shape, including a polygon, circle, oval, and/or another shape orportion of a shape.

The top portion 104 has a first top aperture 106 and a second topaperture 108, each of which extends through the entire top portion 104.In some embodiments, the first top aperture 106 and the second topaperture 108 may extend only partway through the top portion 104. Asshown in FIG. 1B, the bottom portion 120 has a first bottom aperture 150and an second bottom aperture 152, each of which extends through theentire thickness of the bottom portion 120. In some embodiments, theapertures 150, 152 may extend only partway through the top portion 104.The first top aperture 106 and first bottom aperture 150 are positionedcoaxially, defining a first pivot axis. The second top aperture 108 andsecond bottom aperture 152 are positioned coaxially, defining a secondpivot axis. A first contact surface 140 radially surrounds the perimeterof the first bottom aperture 150. A second contact surface 142 radiallysurrounds the perimeter of the second bottom aperture 152. The firstcontact surface 140 and second contact surface 142 can be made frommaterials that are resistant to wear, such as metals, metal alloys,polymers, certain ceramics, and/or other suitable materials. In someembodiment, the first contact surface 140 and second contact surface 142are flush with the bottom surface of bottom portion 120. In someembodiments, the first contact surface 140 and second contact surface142 are any shape, including a polygon, circle, oval, and/or anothershape or portion of a shape. In some embodiments, the first contactsurface 140 and the second contact surface 142 are made of the samematerial as bottom portion 120. In some embodiments, first contactsurface 140 and the second contact surface 142 are made from a differentmaterial than bottom portion 120.

A plurality of legs extend away from the main body 102. Three legsextend away from the main body 102—a first pivot leg 124, a second pivotleg 128, and fixed leg 132. The first pivot leg 124, second pivot leg128, and fixed leg 132 are coupled to the main body 102. A longitudinalportion of each of the first pivot leg 124, second pivot leg 128, andfixed leg 132 extends away from the main body 102 and terminates with amating portion. The first pivot leg 124 has a first mating portion 126,the second pivot leg 128 has a second mating portion 130, and the fixedleg 132 has a fixed mating portion 134. The first mating portion 126,second mating portion 130, and fixed mating portion 134 extendtransversely, respectively, from the longitudinal portion of each of thefirst pivot leg 124, second pivot leg 128, and fixed leg 132. The firstmating portion 126, second mating portion 130, and fixed mating portion134 extend in a direction that is perpendicular to the planar surface ofthe top portion 104 and/or bottom portion 120. The first mating portion126, second mating portion 130, and fixed mating portion 134 areconfigured to releasably couple or connect to a hitch, tow pocket,and/or corresponding mating portion. The first mating portion 126,second mating portion 130, and fixed mating portion 134 extend in adirection opposite the vertical portion 154 of the handle 122. The firstmating portion 126, second mating portion 130, and fixed mating portion134 extend in the same direction. In some embodiments, the first matingportion 126, second mating portion 130, and fixed mating portion 134extend in different directions. In some embodiments, the first matingportion 126, second mating portion 130, and fixed mating portion 134have recesses, which can include radially recesses, that are configuredto interact with a hitch or receiver.

The fixed leg 132 is coupled to the main body 102 such that the fixedleg 132 is immobile relative to the main body 102. The fixed leg 132 iscoupled to an aperture 116 on the back portion 114 such that an endportion 118 of the fixed leg 132 is inserted into the aperture 116. Thefixed leg 132 goes through and/or is coupled to front portion 136. Insome embodiments, the fixed leg 132 is welded to the back portion 114and/or the front portion 136. In some embodiments, the end portion 118of the fixed leg 132 is threaded into a portion of the main body 102,such as the back portion 114. The longitudinal portion of the fixed leg132 is parallel to the grasping portion 156 of the handle 122. Thelongitudinal portion of fixed leg 132 extends perpendicularly from theback portion 114. The longitudinal portion of fixed leg 132 extendsperpendicularly from the front portion 136.

The first pivot leg 124 and second pivot leg 128 are rotatably coupledto the main body 102. In some embodiments, first pivot leg 124 andsecond pivot leg 128 are coupled to the main body 102 such that thefirst pivot leg 124 and second pivot leg 128 are fixed relative to themain body. Portions of the fixed leg 132, first pivot leg 124, andsecond pivot leg 128 have the same cross-sectional shape—a circle—andsize. The first pivot leg 124 and second pivot leg 128 are substantiallythe same. In some embodiments, portions of the fixed leg 132, firstpivot leg 124, and second pivot leg 128 have different cross-sectionalshapes and sizes, including polygons, circles, ovals, and/or anothershape or portion of a shape. In some embodiments, the fixed leg 132,first pivot leg 124, and second pivot leg 128 have anlongitudinal-elongate portion that is curved.

As illustrated in FIG. 1C, the first pivot leg 124 and second pivot leg128 each have a joint 138. The joints 138 each have an aperture. Theaperture of each joint 138 is coaxially aligned with a pivot axis. Theaperture of joint 138 of first pivot leg 124 is coaxially aligned withthe first pivot axis defined by the first top aperture 106 and the firstbottom aperture 150. The joint 138 of the first pivot leg 124 ispositioned between the top portion 104 and the bottom portion 120. Afirst clevis pin 110 is positioned coaxially with the first pivot axisand mates with first top aperture 106, the aperture of joint 138 of thefirst pivot leg 124, and the first bottom aperture 150. This enables thefirst pivot leg 124 to rotate about first clevis pin 110. The firstclevis pin 110 is releasably secured by a first cotter pin 144. Thefirst clevis pin 110 has a head on one end. An elongate body extendsaway from the head of the first clevis pin 110. The head of the firstclevis pin 110 has a diameter that is larger than the elongate body. Thefirst clevis pin 110 has an aperture, on the end opposite the head, thatis configured to interface with first cotter pin 144. First cotter pin144 interfaces with the aperture, on the end opposite the head, of thefirst clevis pin 110 to rotatably couple the first pivot leg 124 to thefirst clevis pin 110 or removed to uncouple the first pivot leg 124 fromfirst clevis pin 110. In some embodiments, the first cotter pin 144 canmake contact with first contact surface 140 when inserted through theaperture of first clevis pin 110.

The aperture of joint 138 of second pivot leg 128 is coaxially alignedwith the second pivot axis defined by second top aperture 108 and secondbottom aperture 152. The joint 138 of second pivot leg 128 is positionedbetween the top portion 104 and the bottom portion 120. A second clevispin 112 is positioned coaxially with the second pivot axis defined bysecond top aperture 108 and second bottom aperture 152 and mates withthe second top aperture 108, the aperture of joint 138 of the secondpivot leg 128, and second bottom aperture 152. This enables the secondpivot leg 128 to rotate about the second clevis pin 112. The secondclevis pin 112 is releasably secured by a second cotter pin 146. Thesecond clevis pin 112 has a diameter that is larger than the elongatebody. The second clevis pin 112 has an aperture, on the end opposite thehead, that is configured to interface with second cotter pin 146. Thesecond cotter pin 146 interfaces with the aperture, on the end oppositethe head, of the second clevis pin 112 to rotatably couple the secondpivot leg 128 to the second clevis pin 112 or removed to uncouple thesecond pivot leg 128 from second clevis pin 112. In some embodiments,the second cotter pin 146 can make contact with the second contactsurface 142 when inserted through the aperture of second clevis pin 112.

The apertures of joints 138 are generally the same size as or slightlylarger than the first top aperture 106, second top aperture 108, firstbottom aperture 150, and second bottom aperture 152. The aperture ofjoints 138 defines an inner perimeter that is cylindrical. The axis ofthe aperture of joints 138 extends, respectively, perpendicularly fromthe longitudinal portion of the first pivot leg 124 and the second pivotleg 128. In some embodiments, the inner surfaces of the apertures ofjoints 138 are configured to aid the rotation of the first pivot leg 124and the second pivot leg 128. In some embodiments, the inner surface ofthe apertures of joints 138 have a low coefficient of friction. In someembodiments, the inner surface of the apertures of joints 138 have acoefficient of friction such that the first pivot leg 124 and the secondpivot leg 128 have resistance when rotating. In some embodiments, joints138 can be sized to generally extend the distance between the innersurfaces of the top portion 104 and the bottom portion 120.

The heads of the first clevis pin 110 and second clevis pin 112 areconfigured to sit flush against the top surface of the top portion 104when in use. The heads of the first clevis pin 110 and second clevis pin112 are a size that is larger than the first top aperture 106, secondtop aperture 108, first bottom aperture 150, and second bottom aperture152. The heads of the first clevis pin 110 and second clevis pin 112have a cylindrical shape. In some embodiments, the heads of the firstclevis pin 110 and second clevis pin 112 can be a variety of shapes,including polygons, prisms, spheres, half spheres, and/or other shapesand/or portions of shapes.

The heads of the first clevis pin 110 and second clevis pin 112 arecoupled to an elongate portion having a length that is longer than thedistance between the outer surfaces of the top portion 104 and bottomportion 120. The ends of the elongate portion of the first clevis pin110 and second clevis pin 112, opposite the heads, are configured tointerface with a locking mechanism that temporarily prevents the firstclevis pin 110 and second clevis pin 112 from being removed from themain body 102. The ends of the elongate portion of the first clevis pin110 and second clevis pin 112, opposite the heads, have an aperture thatextends perpendicularly through the elongate portion. The first cotterpin 144 and second cotter pin 146 are inserted into the apertures thatextend perpendicularly through the elongate portions of each of thefirst clevis pin 110 and the second clevis pin 112. The first cotter pin144 and second cotter pin 146 have pliable portions that are configuredto be manipulated such that the first cotter pin 144 and second cotterpin 146 do not inadvertently come free. The pliable portions of thefirst cotter pin 144 and second cotter pin 146 can be twisted, bent,pressed, and/or forced into a position that rests, respectively, againstthe first contact surface 140 and second contact surface 142, securingthe first clevis pin 110 and second clevis pin 112.

The first pivot leg 124 and second pivot leg 128 rotate from a positionthat is generally parallel to the fixed leg 132, as shown in FIG. 1D, toa position where the longitudinal portion of each of the first pivot leg124 and second pivot leg 128 comes in contact with the back portion 114.The first pivot leg 124 and second pivot leg 128 can be rotated to anyposition between parallel to the fixed leg 132 and contact with the backportion 114. In some embodiments, the angle between the fixed leg 132and each of the first pivot leg 124 and second pivot leg 128 can be 0 to180 degrees.

The first pivot leg 124 and second pivot leg 128 can be replaced orexchanged with new pivot legs. The first cotter pin 144 and secondcotter pin 146 can be removed, allowing the first clevis pin 110 and thesecond clevis pin 112 to be uncoupled from the main body 102. Once thefirst clevis pin 110 and the second clevis pin 112 are removed, thefirst pivot leg 124 and the second pivot leg 128 can be exchanged orreplaced with new pivot legs. New pivot legs can be coupled to the mainbody 102 as described herein.

In some embodiments, the first clevis pin 110 and the second clevis pin112 are coupled to the main body 102 with bolts, pins, rivets, screw,and/or other similar devices that couple the first clevis pin 110 andthe second clevis pin 112 to the main body while allowing the firstpivot leg 124 and the second pivot leg 128 to rotate. In someembodiments, the first clevis pin 110 and the second clevis pin 112 arecoupled to the main body 102 with lock washers, nuts, and/or othersimilar devices positioned on ends of the first clevis pin 110 and thesecond clevis pin 112 while allowing the first pivot leg 124 and thesecond pivot leg 128 to rotate. Other configurations can be implementedto rotatably couple the first pivot leg 124 and the second pivot leg 128to the main body 102.

FIG. 1D is an illustration of tow device 100 in a storage position. Inthe storage position, the first pivot leg 124 and second pivot leg 128are rotated to be generally parallel to the fixed leg 132. The towdevice 100 can be placed in the storage position by tilting the fixedleg 132 vertically. The tilt causes the first pivot leg 124 and secondpivot leg 128 to rotate such that the first pivot leg 124 and secondpivot leg 128 are generally parallel to the fixed leg 132. The towdevice 100 can be hung by handle 122 in the storage position. Storingthe tow device 100 in the storage position can improve safety andspatial use in a warehouse.

As illustrated in FIG. 1E, the tow device 100 can be used to towcontainers. The containers can be used to transport items. The towdevice 100 is used to tow a first container 162 with a vehicle 158. Insome embodiments, the vehicle 158 is a powered industrial vehicle (PIV)such as an automated guided vehicle (AUV) or tug. To couple the vehicle158 to the first container 162, the fixed mating portion 134 of thefixed leg 132 interfaces with a vehicle hitch 160, or other similardevice, of the vehicle 158. In some embodiments, the vehicle hitch 160is releasably coupled to the vehicle 158. The first mating portion 126of the first pivot leg 124 interfaces with the first front containerhitch 164. The second mating portion 130 of the second pivot leg 128interfaces with the second front container hitch 166. In someembodiments, the first front container hitch 164 and second frontcontainer hitch 166 are releasably coupled to the first container 162.As described herein, the first pivot leg 124 and the second pivot leg128 can be rotated to different orientations to appropriately positionthe first mating portion 126 and the second mating portion 130. Duringtowing operations, the fixed leg 132 can pivot or rotate within thevehicle hitch 160 to permit movement when the container is moved arounda corner or through a radius. In some embodiments, the pivoting of thelegs described herein can allow freedom for a container to be pulledthrough a turn or a radius.

Several tow devices can be used to tow multiple containers. A secondcontainer 162′ can be towed behind the first container 162 as describedabove using a second tow device 100′. The fixed mating portion 134′ ofthe fixed leg 132′ interfaces with the back container hitch 168 of thefirst container 162. The first mating portion 126′ of the first pivotleg 124′ interfaces with the first front container hitch 164′ of thesecond container 162′. The second mating portion 130′ of the secondpivot leg 128′ interfaces with the second front container hitch 166′ ofthe second container 162′. A series of containers can be towed in thismanner. In some embodiments, for safety or to meet other requirements, amaximum of three containers can be towed in sequence or in a train. Insome embodiments, more than three containers can be towed in sequence orin a train.

Each of the components, features, and/or characteristics described abovein reference to FIGS. 1A-1E can be made of various materials, which caninclude metals, metal alloys, polymers, carbon fiber, ceramics, and/orother suitable materials.

FIGS. 2A-2G are illustrations of an embodiment of a tow device havingpivot legs that can be locked in position. Tow device 200 can have, butis not limited, to all the features and variation on features of towdevice 100.

As shown in FIG. 2A, tow device 200 has a main body 202. The main body202 has a top portion 204, back portion 214, bottom portion 220, and, asshown in FIG. 2B, a front portion 248. The top portion 204, back portion214, bottom portion 220, and front portion 248 can be varying sizes,shapes, and or thicknesses. The top portion 204 is coupled to and/or hasa handle 222 that is configured to be grasped by a user. The top portion204 has a first top aperture 206 and second top aperture 208, each ofwhich pierces the entire thickness of the top portion 204. As shown inFIG. 2D, the bottom portion 220 has a first bottom aperture 262 andsecond bottom aperture 264, each of which pierces the entire thicknessof bottom portion 220. The first top aperture 206 and first bottomaperture 262 are positioned coaxially, defining a first pivot axis. Thesecond top aperture 208 and second bottom aperture 264 are positionedcoaxially, defining a second pivot axis. A first contact surface 252 canradially surround the perimeter of first bottom aperture 262. A secondcontact surface 254 can radially surround the perimeter of second bottomaperture 264. The first contact surface 252 and second contact surface254 can be made from materials that are resistant to wear. The bottomportion 220 has a center bottom aperture 260. In some embodiments, thecenter bottom aperture 260 can allow a user to access the space betweenthe front portion 248 and the back portion 214.

As shown in FIG. 2A, a plurality of legs extend away from main body 202,including a first pivot leg 224, a second pivot leg 228, and a fixed leg232. The first pivot leg 224 has a first mating portion 226, the secondpivot leg 228 has a second mating portion 230, and the fixed leg 232 hasfixed mating portion 234. The first mating portion 226, second matingportion 230, and fixed mating portion 234 extend, respectively in atransversely downward direction from a longitudinal portion of each ofthe first pivot leg 224, a second pivot leg 228, and a fixed leg 232.The first mating portion 226, second mating portion 230, and fixedmating portion 234 are parallel. The first mating portion 226, secondmating portion 230, and fixed mating portion 234 extend in a directionthat is opposite the handle 222. The first mating portion 226, secondmating portion 230, and fixed mating portion 234 are configured toreleasably couple or connect to a hitch, tow pocket, and/orcorresponding mating portion.

As shown in FIG. 2E, the fixed leg 232 is coupled to the main body 202.The fixed leg 232 is coupled to main body 202 such that fixed leg 232 isimmobile relative to main body 202. The fixed leg 232 goes throughand/or is coupled to the front portion 248. In some embodiments, thefixed leg 232 is coupled to the back portion 214.

As shown in FIG. 2A, the first pivot legs 224 and second pivot leg 228are rotatably coupled to main body 202. As shown in FIG. 2E, the firstpivot leg 224 and second pivot leg 228 each have a joint 250. The joints250 have an aperture. The aperture of each joint 250 is coaxiallyaligned with the first or second pivot axis.

The aperture of joint 250 of the first pivot leg 224 is coaxiallyaligned with the first pivot axis defined by first top aperture 206 andfirst bottom aperture 262. The joint 250 of the first pivot leg 224 ispositioned between the top portion 204 and the bottom portion 220. Afirst clevis pin 210 is positioned coaxially with the first pivot axisand mates with the first top aperture 206, the aperture of joint 250 ofthe first pivot leg 224, and the first bottom aperture 262. This allowsthe first pivot leg 224 to rotate about the first clevis pin 210. Asshown in FIG. 2D, the first clevis pin 210 is releasably secured by afirst cotter pin 256. The first clevis pin 210 can have a head on oneend that has a diameter that is larger than the diameter of alongitudinal body portion that is coupled to one side of the head. Thefirst clevis pin 210 can have an aperture, extending perpendicularlythrough the end of the longitudinal body portion opposite the head end,that is configured to interface with the first cotter pin 256. The firstcotter pin 256 is inserted in the perpendicularly positioned aperture torotatably couple the first pivot leg 224 to the first clevis pin 210 orremoved to uncouple the first pivot leg 224 from the first clevis pin210. In some embodiments, the first cotter pin 256 can make contact withthe first contact surface 252 when inserted through the aperture of thefirst clevis pin 210 and manipulated to secure the first clevis pin 210.

The aperture of joint 250 of the second pivot leg 228 is coaxiallyaligned with the second pivot axis defined by the second top aperture208 and second bottom aperture 264. The joint 250 of the second pivotleg 228 is positioned between the top portion 204 and the bottom portion220. A second clevis pin 212 is positioned coaxially with the secondpivot axis and mates with the second top aperture 208, the aperture ofjoint 250 of the second pivot leg 228, and the second bottom aperture264. This allows the second pivot leg 228 to rotate about the secondclevis pin 212. The second clevis pin 212 is releasably secured by thesecond cotter pin 258. The second clevis pin 212 has a head on one endthat has a diameter that is larger than the diameter of a longitudinalbody portion that is coupled to one side of the head. The second clevispin 212 has an aperture, extending perpendicularly through the end ofthe longitudinal body portion opposite the head end, that is configuredto interface with the second cotter pin 258. The second cotter pin 258is inserted in the perpendicularly positioned aperture to rotatablycouple the second pivot leg 228 to the second clevis pin 212 or removedto uncouple the second pivot leg 228 from the second clevis pin 212. Insome embodiments, the second cotter pin 258 can make contact with thesecond contact surface 254 when inserted through the aperture of thesecond clevis pin 212.

As shown in FIG. 2A, the top portion 204 has a plurality of positioningapertures. The plurality of positioning apertures can be positionedanywhere on the top portion 204. The top portion 204 has fourpositioning apertures, which include first outer positioning aperture240, second outer positioning aperture 242, first inner positioningaperture 244, and second inner positioning aperture 246. The first outerpositioning aperture 240, second outer positioning aperture 242, firstinner positioning aperture 244, and second inner positioning aperture246 have the same size and shape—circular. In some embodiments, thefirst outer positioning aperture 240, second outer positioning aperture242, first inner positioning aperture 244, and second inner positioningaperture 246 can be different sizes and/or shapes, including polygons orother suitable configurations. The first outer positioning aperture 240,second outer positioning aperture 242, first inner positioning aperture244, and second inner positioning aperture 246 are configured to,respectively, interface with a first locking member 236 and secondlocking member 238

The top portion 204 can have a shape that includes a first arm portion266 and a second arm portion 268. The first arm portion 266 and thesecond arm portion 268 can have varying lengths and sizes. The first armportion 266 and the second arm portion 268 extend away from the mainbody 202 with the top surface of the first arm portion 266 and thesecond arm portion 268 coplanar with the top surface of the top portion204. Each of first arm portion 266 and the second arm portion 268 canextend in a direction that is generally at a 90 to 180 degree angle fromthe longitudinal axis of the fixed leg 232. In some embodiments, each ofthe first arm portion 266 and the second arm portion 268 extend in adirection that is 1 to 180 degree angle or more from the other armportion.

The first outer positioning aperture 240, second outer positioningaperture 242, first inner positioning aperture 244, and second innerpositioning aperture 246 are positioned, respectively, on the first armportion 266 and the second arm portion 268. The first outer positioningaperture 240 is placed on the first arm portion 266 and the second outerpositioning aperture 242 is placed on the second arm portion 268. Thefirst inner positioning aperture 244 is placed on the first arm portion266 and the second inner positioning aperture 246 is placed on thesecond arm portion 268. The first inner positing aperture 244 and secondinner positioning aperture 246 are spaced apart at a distance that isless than the distance between the first outer positioning aperture 240and the second outer positioning aperture 242.

The first pivot leg 224 and second pivot leg 228 each have at least onelocking member. The first pivot leg 224 has a first locking member 236.The second pivot leg 228 has a second locking member 238. The firstlocking member 236 and the second locking member 238 are configured tointerface with the first outer positioning aperture 240, second outerpositioning aperture 242, first inner positioning aperture 244, andsecond inner positioning aperture 246.

The first locking member 236 and the second locking member 238 arecylindrical members that extend vertically from the longitudinalportions of the first pivot leg 224 and the second pivot leg 228. Thefirst locking member 236 and the second locking member 238 extendgenerally parallel to the first and second pivot axes. In someembodiments, the first locking member 236 and the second locking member238 can be any size and/or shape, which can include polygonal.

The first locking member 236 and the second locking member 238 areportions of the first pivot leg 224 and second pivot leg 228. In someembodiments, the first locking member 236 and the second locking member238 are coupled, welded, threaded, and/or otherwise attached to thefirst pivot leg 224 and the second pivot leg 228. In some embodiments,the first locking member 236 and the second locking member 238 areactuated to different positions, which may include not extruding beyondthe cross-sectional profile of pivot legs 224 and 228. This can allowpivot legs 224 and 228 to freely rotate. In some embodiments, the firstlocking member 236 and the second locking member 238 can be actuated tointerface with the first outer positioning aperture 240, second outerpositioning aperture 242, first inner positioning aperture 244, and/orsecond inner positioning aperture 246. This can secure the first pivotleg 224 and the second pivot leg 228 in a position such that the firstpivot leg 224 and the second pivot leg 228 do not rotate. In someembodiments, the actuation of the first locking member 236 and thesecond locking member 238 can be facilitated by a spring system. In someembodiments, actuation is manual or automatic.

Joints 250 of the first pivot leg 224 and second pivot leg 228 slidevertically up and down, respectively, the first clevis pin 210 and thesecond clevis pin 212. This facilitates the first locking member 236 andthe second locking member 238 to engage and disengage with the firstouter positioning aperture 240, second outer positioning aperture 242,first inner positioning aperture 244, and/or second inner positioningaperture 246. For example, a user can rotate the first pivot leg 224 toposition the first locking member 236 coaxially with the first outerpositioning aperture 240 and lift the first pivot leg 224 such that thefirst locking member 236 interfaces with the first outer positioningaperture 240. A user disengages the first locking member 238 from thefirst outer positioning aperture 240 by pushing down on the first pivotleg 224, resulting in the first locking member 236 being removed fromthe first outer positioning aperture 240.

The first pivot leg 224 and second pivot leg 228 can be temporarilyfixed in a variety of positions by interfacing the first locking member236 and second locking member 238 with the first outer positioningaperture 240, second outer positioning aperture 242, first innerpositioning aperture 244, and/or second inner positioning aperture 246.The first pivot leg 224 and second pivot leg 228 can be positioned in awide angle configuration. The first pivot leg 224 is positioned suchthat the first locking member 236 interfaces with the first outerpositioning aperture 240. The second pivot leg 228 is positioned suchthat second locking member 238 interfaces with the second outerpositioning aperture 242. The first pivot leg 224 and second pivot leg228 can be positioned in a narrower angle configuration. The first pivotleg 224 is positioned such that the first locking member 236 interfaceswith the first inner positioning aperture 244. The second pivot leg 228is positioned such that second locking member 238 interfaces with thesecond inner positioning aperture 246. This results in a configurationwhere the angle between first pivot leg 224 and second pivot leg 228 issmaller than the angle between the first pivot leg 224 and second pivotleg 228 in the wide-angle configuration.

FIG. 2G is an exemplary illustration of a tow device 200 in a storageposition. In the storage position, the first pivot leg 224 and secondpivot leg 228 are rotated to be generally adjacent and/or parallel tothe fixed leg 232. The tow device 200 can be placed in the storageposition by tilting the fixed leg 232 vertically downward. When thefirst locking member 236 and second locking member 238 are disengaged,the tilt causes the first pivot leg 224 and second pivot leg 228 torotate such that the first pivot leg 224 and second pivot leg 228 aregenerally adjacent and/or parallel to the fixed leg 232. The tow device200 can be hung by handle 222 in the storage position. In someembodiments, the first pivot leg 224 and the second pivot leg 228 can belocked in the storage position. Storing the tow device 200 in thestorage position can improve safety and spatial use in a warehouse.

In use, the tow device 200 can be used to tow containers in the samemanner as the tow device 100. Using locking members and positioningapertures, the first pivot leg 224 and second pivot leg 228 can betemporarily fixed in configurations such that the first mating portion226 and second mating portion 230 are appropriately spaced to releasablyinterface or connect to a hitch, tow pocket, and/or corresponding matingportion.

Each of the components, features, and/or characteristics described abovein reference to FIGS. 2A-2G can be made of various materials, which caninclude metals, metal alloys, polymers, carbon fiber, ceramics, and/orother suitable materials.

FIGS. 3A-3C are illustrations of an embodiment of a tow device. Asillustrated in FIG. 3A, tow device 300 has a fixed leg 302. The fixedleg 302 has an elongate body. The fixed leg 302 is made of squaretubing, which includes standard square tubing. Using standard squaretubing can reduce manufacturing complexity and/or cost. In someembodiments, fixed leg 302 has various cross-sections, including hollow,circular, polygonal, or other suitable shapes.

Fixed leg 302 has a handle 318 positioned proximate an end of fixed leg302. Handle 318 can have at least any of the characteristics and/orvariations of handles 122 and 222. Handle 318 has a vertical portion 322that extends transversely in an upward direction from the longitudinaldirection of fixed leg 302. Handle 318 has a horizontal portion 324 thatextends transversely from the longitudinal direction of the verticalportion 322. The horizontal portion 324 of handle 318 is parallel to thefixed leg 302. The horizontal portion of the handle 318 is offset abovethe elongate body of the fixed leg 302. The handle 318 has a circularcross-section. In some embodiments, the handle 318 has cross-sectionshaving a variety of shapes, including polygonal, tubular, hollow, orother suitable shapes. A curve defines the transition between thevertical portion 322 and the horizontal portion 324 of the handle 318.In some embodiments, a ninety-degree angle defines the transitionbetween the vertical portion 322 and the horizontal portion 324. The towdevice 300 can be hung by handle 318 when stored.

The fixed leg 302 has a mating portion 310 positioned proximate the sameend of fixed leg 302 as the handle 318. The mating portion 310 extendstransversely downward from the longitudinal direction of the fixed leg302. Mating portion 310 extends in the opposite direction as thevertical portion 322 of handle 318. The mating portion 310 is positionedcoaxially with the axis of the vertical portion of handle 318.

The fixed leg 302 has a mating portion 312 positioned proximate an endof fixed leg 302 that is generally opposite mating portion 310. Themating portion 312 extends transversely downward from the longitudinaldirection of fixed leg 302. The mating portion 312 extends in theopposite direct as the vertical portion of handle 318. The matingportion 312 is parallel to mating portion 310. The mating portion 312extends through fixed leg 302 such that an end of mating portion 312 ison one side of fixed leg 302 and an opposing end of mating portion 312is on another side of fixed leg 302.

The tow device 300 has a top portion 306 and a bottom portion 308. Thetop portion 306 and bottom portion 308 are tabs. The top portion 306 andbottom portion 308 are coupled to the fixed leg 302. In someembodiments, top portion 306 and bottom portion 308 are welded ontofixed leg 302. The top portion 306 and bottom portion 308 each includetwo substantially flat planes at different elevations, a first andsecond plane. A curve, incline, and/or step transitions between thefirst plane and the second plane. The first plane of the top portion 306is coupled to the top surface of the fixed leg 302 such that the secondplane of the top portion 306 is positioned at a higher elevationrelative to the first plane. The first plane of the bottom portion 308is coupled to the bottom surface of the fixed leg 302 such that thesecond plane of the bottom portion 308 is positioned at a lowerelevation relative to the first plane. The top portion 306 and bottomportion 308 are parallel and offset from each other. The second plane ofthe top portion 306 and the second plane of the bottom portion 308 areoffset from each other. The distance between the second plane of the topportion 306 and the second plane of the bottom portion 308 is greaterthan the cross-section of the pivot leg 304. The top portion 306 andbottom portion 308 extend transversely from the longitudinal directionof the fixed leg 302.

Tow device 300 has a pivot leg 304. The pivot leg 304 can has anelongate body. The pivot leg 304 is made of square tubing, which caninclude standard square tubing. In some embodiments, the pivot leg 304can have various cross-sections, including hollow, circular, polygonal,or other suitable shapes. The pivot leg 304 has a mating portion 314positioned proximate an end of the pivot leg 304. The mating portion 314extends transversely downward from the longitudinal direction of pivotleg 304. The mating portion 314 can extend in the opposite direct as thevertical portion 322 of handle 318. The mating portion 314 is parallelto the mating portion 310 and/or mating portion 312. The mating portion314 is welded to pivot leg 304. In some embodiments, mating portion 314extends through pivot leg 304 such that an end of mating portion 314 ison one side of pivot leg 304 and an opposing end of mating portion 314is on an opposing side of pivot leg 304. In some embodiments, matingportions 310, 312, and 314 have circular cross section shapes.

The mating portions 310, 312, and 314 are all the same length and/orhave the same cross-sectional shape. In some embodiments, matingportions 310, 312, and 314 have varying lengths and/or cross-sectionalshapes. The mating portions 310 and 312 are welded to fixed leg 302.

Pivot leg 304 is rotatably coupled to fixed leg 302. The end of pivotleg 304 opposite the mating portion 314 is rotatably coupled to fixedleg 302. Pivot leg 304 is coupled to fixed leg 302 by a pin 316 thatextends through a portion of pivot leg 304 proximate the end oppositethe mating portion 314. The top portion 306 has an aperture, the bottomportion 308 has an aperture, and the pivot leg 304 has an aperturepositioned on the end portion of pivot leg 304 opposite the matingportion 314. The pivot leg 304 is rotatably coupled by coaxiallyaligning the apertures of the top portion 306, pivot leg 304, and bottomportion 308, and once aligned, placing pin 316 in the apertures andcoupling the pin 316 to the top portion 306 and bottom portion 308. Thepin 316 is welded to the top portion 306 and bottom portion 308. The endportion of pivot leg 304, opposite mating portion 314, is positionedbetween the offset second planes of the top portion 306 and bottomportion 308 such that the pivot leg 304 is not flush with both the topportion 306 and bottom portion 308 at the same time when rotatablycoupled. In some embodiments, pivot leg 304 is coupled to the topportion 306 and bottom portion 308 with a clevis pin and cotter pin, asdescribed herein, or in another suitable configuration.

As shown in FIGS. 3B and 3C, fixed leg 302 has an extrusion 320.Extrusion 320 extends transversely from the longitudinal direction ofthe fixed leg 302. The extrusion 320 extends in a horizontal direction.The extrusion 320 extends in a direction that is parallel to thelongitudinal direction of the top portion 306 and bottom portion 308.The extrusion 320 extends transversely from the longitudinal directionof the fixed leg 302 such that the extrusion 320 is positioned betweenthe fixed leg 302 and the pivot leg 304 when the tow device 300 isoriented vertically and pivot leg 304 is free to hang substantiallyparallel to the fixed leg 302. The extrusion 320 prevents the end ofpivot leg 304 with mating portion 314 from making contact with the endof fixed leg 302 with mating portion 312. The extrusion 320 iscylindrical. Extrusion 320 has a rounded free end. The extrusion 320 iscoupled to fixed leg 302, which includes being welded to fixed leg 302.The extrusion 320 is positioned on the half of fixed leg 302 that iscoupled to the top portion 306 and bottom portion 308. In someembodiments, extrusion 320 can have a variety of sizes and shapes, whichcan include polygonal, tubular, or other suitable cross-sections. Insome embodiments, the pivot leg 304 has an extrusion.

Tow device 300 can be placed in a storage position that is the same orsimilar to the storage position of other tow devices disclosed herein.The process for placing the tow device 300 in the storage position isthe same or similar to the processes disclosed herein in relation toother tow devices. In the storage position, the pivot leg 304 rotates tobe proximate and/or substantially parallel to the fixed leg 302. Theextrusion 320 makes contact with pivot leg 304, such that the elongatebody of the fixed leg 302 and pivot leg 304 do not make contact.

In use, the tow device 300 can be used to tow containers in the same orsimilar manner as other tow devices disclosed herein. Mating portions310, 312, and 314 of tow device 300 can releasably couple or connect toa hitch, tow pocket, and/or corresponding mating portion. One or moretow devices 300 can be employed to allow a vehicle to tow one or morewire containers, pallets, wheeled shelves, bins, and/or other device.

Each of the components, features, and/or characteristics described abovein reference to FIGS. 3A-3C can be made of various materials, which caninclude metals, metal alloys, polymers, carbon fiber, ceramics, and/orother suitable materials.

The foregoing description details certain embodiments of the systems,devices, and methods disclosed herein. It will be appreciated, however,that no matter how detailed the foregoing appears in text, the systems,devices, and methods may be practiced in many ways. As is also statedabove, it should be noted that the use of particular terminology whendescribing certain features or aspects of the invention should not betaken to imply that the terminology is being re-defined herein to berestricted to including any specific characteristics of the features oraspects of the technology with which that terminology is associated.

It will be appreciated by those skilled in the art that variousmodifications and changes may be made without departing from the scopeof the described technology. Such modifications and changes are intendedto fall within the scope of the embodiments. It will also be appreciatedby those of skill in the art that parts included in one embodiment areinterchangeable with other embodiments; one or more parts from adepicted embodiment may be included with other depicted embodiments inany combination. For example, any of the various components describedherein and/or depicted in the Figures may be combined, interchanged orexcluded from other embodiments.

With respect to the use of substantially any plural and/or singularterms herein, those having skill in the art may translate from theplural to the singular and/or from the singular to the plural as isappropriate to the context and/or application. The varioussingular/plural permutations may be expressly set forth herein for sakeof clarity.

It will be understood by those within the art that, in general, termsused herein are generally intended as “open” terms (e.g., the term“including” should be interpreted as “including but not limited to,” theterm “having” should be interpreted as “having at least,” the term“includes” should be interpreted as “includes but is not limited to,”etc.). It will be further understood by those within the art that if aspecific number of an introduced claim recitation is intended, such anintent will be explicitly recited in the claim, and in the absence ofsuch recitation no such intent is present. For example, as an aid tounderstanding, the following appended claims may contain usage of theintroductory phrases “at least one” and “one or more” to introduce claimrecitations. However, the use of such phrases should not be construed toimply that the introduction of a claim recitation by the indefinitearticles “a” or “an” limits any particular claim containing suchintroduced claim recitation to embodiments containing only one suchrecitation, even when the same claim includes the introductory phrases“one or more” or “at least one” and indefinite articles such as “a” or“an” (e.g., “a” and/or “an” should typically be interpreted to mean “atleast one” or “one or more”); the same holds true for the use ofdefinite articles used to introduce claim recitations. In addition, evenif a specific number of an introduced claim recitation is explicitlyrecited, those skilled in the art will recognize that such recitationshould typically be interpreted to mean at least the recited number(e.g., the bare recitation of “two recitations,” without othermodifiers, typically means at least two recitations, or two or morerecitations).

Furthermore, in those instances where a convention analogous to “atleast one of A, B, and C, etc.” is used, in general such a constructionis intended in the sense one having skill in the art would understandthe convention (e.g., “a system having at least one of A, B, and C”would include but not be limited to systems that have A alone, B alone,C alone, A and B together, A and C together, B and C together, and/or A,B, and C together, etc.). In those instances where a conventionanalogous to “at least one of A, B, or C, etc.” is used, in general sucha construction is intended in the sense one having skill in the artwould understand the convention (e.g., “a system having at least one ofA, B, or C” would include but not be limited to systems that have Aalone, B alone, C alone, A and B together, A and C together, B and Ctogether, and/or A, B, and C together, etc.). It will be furtherunderstood by those within the art that virtually any disjunctive wordand/or phrase presenting two or more alternative terms, whether in thedescription, claims, or drawings, should be understood to contemplatethe possibilities of including one of the terms, either of the terms, orboth terms. For example, the phrase “A or B” will be understood toinclude the possibilities of “A” or “B” or “A and B.”

The term “comprising” as used herein is synonymous with “including,”“containing,” or “characterized by,” and is inclusive or open-ended anddoes not exclude additional, unrecited elements or method steps.

All numbers expressing quantities of ingredients, reaction conditions,and so forth used in the specification and claims are to be understoodas being modified in all instances by the term “about.” Accordingly,unless indicated to the contrary, the numerical parameters set forth inthe specification and attached claims are approximations that may varydepending upon the desired properties sought to be obtained by thepresent invention. At the very least, and not as an attempt to limit theapplication of the doctrine of equivalents to the scope of the claims,each numerical parameter should be construed in light of the number ofsignificant digits and ordinary rounding approaches.

The above description discloses several methods and materials of thepresent disclosure. This disclosure is susceptible to modifications inthe methods and materials, as well as alterations in the fabricationmethods and equipment. Such modifications will become apparent to thoseskilled in the art from a consideration of this disclosure or practiceof the development disclosed herein. Consequently, it is not intendedthat this disclosure be limited to the specific embodiments disclosedherein, but that it cover all modifications and alternatives comingwithin the true scope and spirit of the disclosure as embodied in theattached claims.

While the above detailed description has shown, described, and pointedout novel features of the improvements as applied to variousembodiments, it will be understood that various omissions,substitutions, and changes in the form and details of the device orprocess illustrated may be made by those skilled in the art withoutdeparting from the spirit of the invention. As will be recognized, thepresent invention may be embodied within a form that does not provideall of the features and benefits set forth herein, as some features maybe used or practiced separately from others. The scope of the inventionis indicated by the appended claims rather than by the foregoingdescription. All changes which come within the meaning and range ofequivalency of the claims are to be embraced within their scope.

What is claimed is:
 1. A tow device comprising: a fixed leg comprising afirst end and a second end, the first end comprising a first matingportion and the second end comprising a second mating portion, the firstmating portion comprising a first longitudinal axis and the secondmating portion comprising a second longitudinal axis, wherein the firstlongitudinal axis and the second longitudinal axis are transverserelative to a longitudinal axis of the fixed leg; a pivot leg comprisinga first end and a second end, the first end of the pivot leg rotatablycoupled proximate to the first end of the fixed leg and the second endof the pivot leg comprising a third mating portion, the third matingportion comprising a third longitudinal axis that is transverse relativeto a longitudinal axis of the pivot leg; and a handle disposed on thefirst end of the fixed leg, the handle comprising a vertical portionthat extends in a direction opposite the first mating portion.
 2. Thetow device of claim 1, wherein the handle comprises a horizontal portionextending in a direction generally parallel to the longitudinal axis ofthe fixed leg.
 3. The tow device of claim 2, wherein the horizontalportion extends in a direction perpendicular to a longitudinal axis ofthe vertical portion.
 4. The tow device of claim 1, wherein the verticalportion is coaxially oriented relative to the first mating portion. 5.The tow device of claim 1, wherein the first longitudinal axis of thefirst mating portion, the second longitudinal axis of the second matingportion, and the third longitudinal axis of the third mating portion areparallel to each other.
 6. The tow device of claim 1, wherein one of thefixed leg and the pivot leg comprises an extrusion that extends towardthe other of the fixed leg and the pivot leg such that the extrusionspaces the pivot leg and the fixed leg away from each other.
 7. The towdevice of claim 1, wherein the fixed leg comprises a protrusion thatconnects to the first end of the pivot leg and spaces the fixed leg andpivot leg a distance apart from each other.
 8. The tow device of claim7, wherein the protrusion is fixedly connected to the first end of thefixed leg and pivotably connected to the first end of the pivot leg,allowing the pivot leg to move relative to the fixed leg.
 9. The towdevice of claim 1, wherein the first mating portion, the second matingportion, and the third mating portion each comprise a circularperiphery.
 10. The tow device of claim 1, further comprising anextrusion connected to the fixed leg and extending in a directiontransverse to the longitudinal axis of the fixed leg and which contactsthe pivot leg when the second end of the pivot leg is rotated proximateto the second end of the fixed leg.
 11. A tow device comprising: a firstleg comprising a first end and a second end, the first end of the firstleg comprising a first mating portion and the second end of the firstleg comprising a second mating portion, wherein the first mating portionand the second mating portion extend transversely away from the firstleg; a second leg comprising a first end and a second end, the first endof the second leg rotatably coupled to the first leg with the first endof the second leg spaced away from the first end of the first leg, andthe second end of the second leg comprising a third mating portionextending transversely away from the second leg; and a top portion and abottom portion, the top portion coupled to a top surface of the firstleg and the bottom portion coupled to a bottom surface of the first legsuch that the top portion and the bottom portion are disposed oppositeeach other, wherein the first end of the second leg is disposed betweenthe top portion and the bottom portion.
 12. The tow device of claim 11,wherein the top portion and the bottom portion are pivotably connectedto the second leg.
 13. The tow device of claim 11, wherein the topportion comprises a tab and the bottom portion comprises another tab.14. The tow device of claim 11, wherein the first mating portion, thesecond mating portion, and the third mating portion each comprise acylindrical structure.
 15. The tow device of claim 11, furthercomprising a handle disposed on the first leg.
 16. The tow device ofclaim 11, further comprising an extrusion disposed on one of the firstleg or the second leg that extends toward the other of the first leg orthe second leg to prevent the second end of the first leg and the secondend of the second leg from contacting each other.